In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

Input: Consider Input: Question: How high is the gamma radiation from nuclear fuel? Passage:The nuclear fuel elements were made of refractory ceramic based on beryllium oxide, with enriched uranium dioxide as fuel and small amount of zirconium dioxide for structural stability. The fuel elements were hollow hexagonal tubes about long with distance between the outer parallel planes, with inside diameter of . They were manufactured by high-pressure extruding of the green compact, then sintering almost to its theoretical density. The core consisted of 465,000 individual elements stacked to form 27,000 airflow channels; the design with small unattached elements reduced problems related with thermal stresses. The elements were designed for average operation temperature of ; the autoignition temperature of the reactor base plates was only 150 °C higher. The neutron flux was calculated to be 9×10 neutrons/(cm·s) in the aft and 7×10 neutrons/(cm·s) in the nose. The gamma radiation level was fairly high due to the lack of shielding; radiation hardening for the guidance electronics had to be designed.
 Links: a. Beryllium oxide b. Radiation hardening c. Nuclear fuel d. Radiation hardening

Output: c


Input: Consider Input: Question: Who starred alongside Elijah Wood in the Everything is Illuminated adaptation? Passage:Foer graduated from Princeton in 1999 with a degree in philosophy, and traveled to Ukraine to expand his thesis. In 2001, he edited the anthology A Convergence of Birds: Original Fiction and Poetry Inspired by the Work of Joseph Cornell, to which he contributed the short story, "If the Aging Magician Should Begin to Believe". His Princeton thesis grew into a novel, Everything Is Illuminated, which was published by Houghton Mifflin in 2002. The book earned him a National Jewish Book Award (2001) and a Guardian First Book Award (2002). Foer shared the PEN/Robert W. Bingham Prize with fellow authors Will Heinrich and Monique Truong in 2004. In 2005, Liev Schreiber wrote and directed a film adaptation of the novel, which starred Elijah Wood.
 Links: a. Philosophy b. Liev Schreiber c. Joseph Cornell d. Everything Is Illuminated (film)

Output: d


Input: Consider Input: Question: Which of the two people who represented Tipperary and Cork had the longest career? Passage:The 1970s began with Tipperary and Cork being respectively represented by Tadhg O'Connor and Paddy Barry. Kilkenny's captain from 1969 and a player regarded as one of the greatest forwards of all time, Eddie Keher, was introduced next. Keher was followed onto the field of play by Wexford's 1968 captain, Dan Quigley, and Kilkenny's 1967 captain, Jim Treacy. At the time Quigley was the last Wexford man to captain his county to the All-Ireland title. Gerald McCarthy was one of the youngest captains to take to the field. He was only twenty years-old when he guided Cork to the All-Ireland title in 1966. He was followed by Mick Murphy, Tipperary's victorious captain of 1964 and Séamus Cleere, Kilkenny's captain of 1963. Jimmy Doyle, regarded by many as one of the greatest players of all time and the All-Ireland winning captain of 1962 and 1965, was followed by Matt Hassett who guided Tipperary to the title in 1961. Frankie Walsh of Waterford, the last man to captain his county to a championship, followed before Tipperary's 1958 All-Ireland-winning captain Tony Wall took to the field.
 Links: a. Tadhg O'Connor b. Tadhg O'Connor c. Eddie Keher d. Mick Murphy (Tipperary hurler)


Output: a


